Sampler, i have to digest it but error feed forward is a great way to do it. I can make a better mirror too then in the Pardise but i decided on moderate output impedance because of DC offset issues.
What i would really like to see is your design in parallel symmetric ( if better or necessary ) with a balanced, differential input stage. J-Fet input or not. If we only use N-Channels this is not a component sourcing problem anyway. We can call that the Starless-Balanced and i would 100% support that design.

My schematic says R47 = 10 Ohm R51 = 15 Ohm
so they are different
This resistors set bias in the output stage so there is 50% more voltage over the 15 Ohm resistor
That affects output DC offset, that is corrected by the servo anyway.
Say 2mA flow over the 10 Ohm so we have Ube plus 10 Ohm x 2mA = 0,65V plus 0,02V = 0,67 V. That develops also from base to output in the output so the output idles at 1,333mA. You can calculate the same in the other polarity with 15 Ohm. Ube can be different in NPN and PNP transistors though. That values look a bit off to me because the input stage would idle more then the output stage that may have a harder load to drive. 22 Ohm seems to be more correct.